DE2954429C2 - - Google Patents

Info

Publication number
DE2954429C2
DE2954429C2 DE19792954429 DE2954429A DE2954429C2 DE 2954429 C2 DE2954429 C2 DE 2954429C2 DE 19792954429 DE19792954429 DE 19792954429 DE 2954429 A DE2954429 A DE 2954429A DE 2954429 C2 DE2954429 C2 DE 2954429C2
Authority
DE
Germany
Prior art keywords
suppression
response
detection
actuating
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE19792954429
Other languages
German (de)
Other versions
DE2954429A1 (en
Inventor
Dov Savion Il Spector
Yechiel Tel Aviv Il Spector
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spectronix Ltd
Original Assignee
Spectronix Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to IL5413878A priority Critical patent/IL54138A/en
Application filed by Spectronix Ltd filed Critical Spectronix Ltd
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11050119&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE2954429(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Publication of DE2954429A1 publication Critical patent/DE2954429A1/de
Application granted granted Critical
Publication of DE2954429C2 publication Critical patent/DE2954429C2/de
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/2496Self-proportioning or correlating systems
    • Y10T137/2708Plural sensors

Description

The invention relates to an actuation circuit for the Use in fire and explosion suppression Arrangement comprising a plurality of detectors and one Plurality of suppression elements.

There are many fire and explosion suppression arrangements proposed on the market and for fire fighting been. They use heat, light or pressure sensors that a fire or explosion capture and extinguishing units trigger; it is known that they have different fires Can delete origin.

However, there are currently no fire and explosion sub pushing arrangement that would be able to evolve sions from both high and low energy Detona effective suppression. An explosion that for example when a HEAT (high-energy anti Tank) bullet on an armored vehicle must be inside suppressed half about 100 ms after the start of the explosion have been. If there is a suppression within this Can be reached, the skin burns remain the tank crew on first degree burns and the Pressure increase limited to about one bar.

An actuation circuit of the type mentioned is both from US-PS 38 25 754 and from the US-PS 39 31 521 known. This actuation circuit receives as Input signal a detector output signal from one of the A plurality of detectors comprising detectors, the the presence of a fire or an incipient explosion sion in a volume of space to be protected and in Response to the detector output signal mentioned. The formation of the actuation circuit is in the  the aforementioned U.S. patents, however as an example, a countdown register is given that a plurality of free gas cylinders electromechanically can operate by any generated by the detector array pulse-shaped detector output signal is used to through the countdown register every time there is a fire or an explosion occurs, a separate freon pressure gas activate bottle. Such an actuation circuit does not distinguish between different types of Explosions, as they are always indistinguishable from a free gas bottle operated, regardless of whether one is up or down there is an energetic explosion. As a result, there is no optimal protection for the crew of combat vehicles guaranteed with such an actuation circuit including the associated fire and explosion sub pushing arrangement and including the associated Detectors are equipped.

Apart from this, the actuation circuit is according to the US-PS 39 31 521 also disadvantageous insofar as that before seen detector arrangement a double spectrum IR fire detector by simultaneous incidence of radiation energy in the spectral bands 7 to 30 µm and 0.7 to 1.2 µm is activated. The longer-wave spectral band is doing so with a heat detector such as one Thermopile detected. This detector arrangement has the disadvantage that the short-wave detector is also visible, through the Atoms transmitted light responds during the longer-wave detector in one area relatively strong noise works. Therefore, this arrangement in Operation a relatively low sensitivity threshold.

Also the detector arrangement, which in connection with the Actuating circuit according to US-PS 38 25 754 is provided  is a double spectrum IR fire detector similar to that in the US-PS 39 31 521 described with a three-channel IR radiation detection system to switch between large explosive Distinguish between fires and serious explosions, where there is no fire. In U.S. Patent No. 38 25 754 Detector arrangement described therefore has the same after part, such as the detector arrangement according to US-PS 39 31 521.

In US-PS 36 65 440 is a fire detector arrangement for Generate an alarm signal that describes an infrared Detector and has an ultraviolet detector, the operated simultaneously and their output signals for ver avoiding false alarms together to a single stop signal can be linked, but this is only an alarm triggers. This fire detector arrangement provides an output signal also only if during the incident of IR radiation does not also invade UV radiation. A such a detector system is beginning for the detection Explosions are not suitable.

Finally, US Pat. No. 3,653,016 describes a combined one UV and IR light detector, in which the two elements work together to distinguish fire. There also visible If light is detected, the false alarm rate of such will decrease Detector if there is visible light in the area of use lies. Again, only one alarm signal is generated and none Fire or explosion suppression element triggered.

The object of the invention is an actuation circuit of the trained in such a way that they are in combat is usable and provides optimal protection for the Crew these combat vehicles at the lowest possible Actuation, d. H. availability as long as possible, grant accomplishes.  

This object is achieved in that the Actuation circuit a first, in a first operating Art working device for operating the suppression elements in response to different types of detection comprising the following:

  • a) a first facility in response to a Detection by a first number of detectors inside half a first period works in such a way that they a first number of suppression elements operated; and
  • b) a second facility in response to a Detection by a second number of detectors works within a second period of time that they have a second number of suppression elements operated.

In this way, on the one hand, optimal protection of the Crew of a combat vehicle reached with the Actuating circuit is equipped according to the invention, and on the other hand, the suppressing elements are prevented too numerous in the much lower danger case operated, which is otherwise a frequent replacement of the sub would result in pressure elements.

Further developments of the invention are in the subclaims specified.

The invention will now be described with reference to some in the figures the drawing shown, particularly preferred management forms explained in more detail, it shows

Fig. 1 is a block diagram of a fire and explosion suppression arrangement in which an actuation circuit of the invention can be used;

Figure 2 is a graph of pressure as a function of time during an explosion.

Fig. 3 is a block diagram of a signal processing circuit which can be used in the fire and explosion suppression arrangement of Fig. 1;

Fig. 4 is a schematic diagram showing the arrangement of suppression elements and detectors and in an embodiment of the present invention in a typical armored vehicle;

FIGS. 5A and 5B are flow charts showing an actuation circuit the normal and the battle operation of the functional logic which is constructed according to one embodiment of the invention; and

Fig. 6 shows an embodiment of a suppression element in the form of a container containing extinguishing agent with a release valve and a pressure detector.

The fire and explosion suppression arrangement shown in Fig. 1 has an IR detector 30 ' and a UV detector 32' . The IR detector 30 ' can be any suitable IR detector for the wavelength range from 1.5 to 3.0 microns; it typically receives its operating voltage from a 12 V or 24 V DC voltage supply from a stabilizer 34 .

According to a preferred embodiment, the detected wavelength range of the IR detector 30 'is limited to 2.5 to 2.75 µm. The radiation at these wavelengths is essentially absorbed by the earth's atmosphere, so that the false alarm rate drops.

The UV detector 32 ' works in the wave range up to 0.3 microns.

It is a special feature of the present embodiment that both the IR detector 30 ' and the UV detector 32' operate outside the visible spectral range. As a result, they work with a relatively high sensitivity, without having the unacceptably high false alarm rate, which would be unavoidable when detecting visible light.

The output signal of the IR detector 30 ' goes to a pre-amplifier 40' , the amplified output signal of which goes to a threshold circuit 42 ' . Accordingly, the output signal of the UV detector 32 'is given to a pre-amplifier 44' , the amplified output signal of which goes to a threshold circuit 46 ' . The output signals of the threshold circuits 42 ', 46' are given to a logic arrangement 48 , which can typically be an AND gate. The output message, which the logic arrangement 48 emits from the threshold value circuits 42 ' and 46' when there are alarm signals at the same time, goes to a use device 50 , which is an automatic fire and explosion suppression arrangement as mentioned above, which may be can be supplemented by an alarm device. Between the stabilizer 34 and the UV detector 32 ' a device for upward transformation 36 and a rectifier 38 are inserted.

How important a short reaction time is when detecting explosions can be seen from FIG. 2, which shows the pressure increase in an enclosed, at least partially tightly closed volume of space as a function of the time after the ignition of an explosive mixture. . The curve of Figure 2 begins approximately 40 to 120 ms after ignition; in a typical case, the pressure increase therefore begins approximately 40 to 120 ms after the ignition. It can be seen that the shape of the curve of FIG. 2 and the use and the maximum of the pressure rise can change with the ignited energy source and the shape of the envelope of the pressure space.

From the typical case shown in FIG. 2 it can be seen that the pressure maximum occurs approximately 240 ms after the onset of the pressure increase. So to suppress an explosion with the properties shown in Fig. 2 before the pressure maximum is reached, the ignition point must be detected within 40 to 100 ms after the ignition point and before the pressure rise and the suppression within about 160 ms after Be carried out.

The fire and explosion suppression arrangement described above is very suitable for performing this task. A fire and explosion suppression arrangement corresponding to that shown in Fig. 1 has been experimentally constructed and tested and showed a response time of less than 2 ms, so that an output signal is already 10 ms after the penetration of a HEAT (high-energy anti Tank) bullet in an armored vehicle revealed.

FIG. 3 shows a signal processing circuit for preventing false alarms, which can be included in the threshold circuit used in the fire and explosion suppression arrangement according to FIG. 1 or added to the device shown here as an additional element. The purpose of this signal processing circuit is to distinguish between interference signals and an actual alarm condition.

When using optical detectors such as a UV sensor, a detector 60 delivers output signals to a monostable multivibrator 62 , which converts these signals into a signal of uniform duration and amplitude. The output signal of flip-flop 62 goes to a counter 66 and a second monostable flip-flop 64 . The flip-flop 64 determines the counting time and supplies an intrusion signal of certain duration to the counter 66 when an output signal from the flip-flop 62 has arrived. The flip-flop 64 is typically reset automatically so that the counter can be cleared repeatedly and a new counting process can begin.

The counter 66 counts the uniform pulses received by the flip-flop 62 as long as the flip-flop 64 determines it. If a predetermined number of pulses, typically 5 to 10, has been counted at the end of this counting period, which number indicates an alarm state, then the counter 66 outputs an output signal to the AND gate 68 . The AND gate 68 receives another input signal from the second flip-flop 64 , which indicates the end of the counting period. If the output signals of the counter 66 and the second flip-flop 64 are present at the same time, the AND gate 68 outputs an output signal to the logic arrangement 48 , which indicates that an alarm state has been detected.

The circuit shown here is just an example of one wide range of logic and detection circuits that for detection in the various embodiments can be used.

Fig. 4 shows an arrangement of the fire and explosion suppression arrangement with actuation circuits in a typical armored vehicle. This arrangement is divided into two sub-systems, namely an arrangement I for the protection of the crew compartment and an arrangement II for the protection of the engine compartment. The functioning of these two arrangements I and II provided as subsystems will be described below with reference to FIGS. 5A and 5B.

The arrangement I has an actuation circuit 20 , which receives alarm inputs from three detectors 22 distributed in the oval-shaped team compartment 24 . The detectors 22 are of the type described above. The actuation circuit 20 also receives an input signal from a manually operable device 26 designed as a trigger switch on the outside of the vehicle.

The actuation circuit 20 is electrically connected to a pair of distributor devices 28, 30 for the extinguishing agent. The distributor device 28 typically has two containers containing extinguishing agent as suppression elements 32 , while the distributor device 30 can have either one or two such suppression elements. The suppression elements 32 and their associated devices are described below with reference to FIG. 6. The arrangement and orientation of the suppression elements 32 is determined empirically for each vehicle or space to be protected so that the extinguishing agent is distributed quickly and evenly when triggered. For the following discussion it is assumed that each of the suppression elements 32 is equipped with a release valve 230 and a pressure detector 252 . The pressure detector 252 enables continuous reporting of the operational capability of the suppressing elements 32, 210 in the sense that the suppressing element 32, 210 is under full pressure, as well as an immediate display of the extinguishing agent leak.

The arrangement II for protecting the engine compartment is in the illustrated embodiment in the rear part of the armored vehicle and has the actuating circuit 40 , which is triggered by a wire heat sensor 42 which extends around the engine compartment. The actuation circuit 40 can also be triggered with a manually operated switch, for example that provided as the device 26 .

The actuating circuit 40 serves to actuate a distributor 44 for the extinguishing agent, which is located in the front part of the vehicle and is connected via a line 46 to the engine compartment in the rear part of the vehicle.

Arrangements I and II receive electrical operating power from a suitable main and an auxiliary service supply and are designed so that they also at otherwise vehicle inoperable.

The actuation circuit 20 shown schematically in FIG. 4 can operate in two operating modes, namely in a normal operating mode if the probability of enemy fire is low and in a combat mode if enemy fire is possible. The exact function of the actuation circuit, which consists of conventional logic circuits, will now be described in detail with reference to the flowcharts of FIGS. 5A and 5B. These flowcharts apply to an arrangement with four suppressors 32 .

There are four options for normal operation ( FIG. 5A) with three detectors. If only one detector is activated, the arrangement does not respond.

If two detectors are activated within more than 10 ms and is the suppression referred to as container # 1  element operational, then container No. 1 operated. After the function has ended, the arrangement is according to ready for normal operation again for five seconds. Does not trigger container # 1 and is as a container No. 2 designated suppressor becomes operational the latter operated. After the function has ended, the order is ready for use again after five seconds.

If container # 2 does not fire when pressed, or both containers 1 and 2 are not operational, becomes the suppression referred to as container # 3 element triggered if it is operational. After finished The function is normal after five seconds operation ready again. If container # 3 is not is operational or does not trigger when pressed, it will as a container No. 4 suppressing element actuated if it is ready for operation.

If two or all within less than 10 ms address three detectors, container # 1 and No. 3 activated if ready for use. If the Container # 1 is not operational or when pressed does not trip, container # 2 is actuated if he is operational. If the containers No. 2 or No. 3 are inoperable or do not trigger when activated, the container No. 4 is operated if it is operational ready. When containers 3 and 4 are in operation are incapable or, when activated, do not trigger, and the container No. 1 works properly, the container becomes No. 2 actuated if operational. After two Working containers is the arrangement after five seconds usable for normal operation to the extent how operable containers remain.

The arrangement operates in combat mode in response to a manual command ( Fig. 5B). In combat operation, the functioning of the arrangement is the same regardless of the number of detectors activated at the same time. If one or more detectors responds, the actuating device actuates containers No. 1 and No. 3 if they are ready for use. If container # 1 is not operational, containers # 2 and # 3 will be operated if operational. If container # 3 is not operational, containers # 1 and # 4 are operated accordingly if they are ready for use.

If container # 1 does not work when pressed, the container No. 2 is actuated if it is operational ready. If container # 2 is not used either is ready or, when activated, does not work the container No. 4 is actuated if it is ready for use. If, accordingly, container No. 2 does not work, if actuated, container No. 4 will be triggered if he is ready for use. If container # 4 either is not operational or, if actuated, not works, the container No. 2 is triggered, if one is ready to go.

Both containers No. 1 and No. 3, if actuated, should not work, then containers # 2 and # 4 are made solved if they are ready for use.

After two containers provided as suppression elements working properly, the arrangement is after five seconds ready for use again to the extent that it is operational Containers remain as suppression elements.

It is a peculiarity of the present embodiment, that the operations described above in very short Periods of the order of milliseconds take place  find the inoperative suppression elements against ready-to-use suppression elements quickly exchange that suppresses an explosion can be.

It should now be referred to FIG. 6, which shows an embodiment of a suppressor element designed as a container for extinguishing material, a release valve and a pressure detector in one embodiment. It is a peculiarity of the present embodiment that the container can empty its contents within 150 ms after the receipt of an actuation signal.

The suppression element 210, which is designed as a container, is a special construction which allows the contents thereof to be dispensed extremely quickly. The design parameters of the suppression element as well as its filling and pressurizing will now be described.

Based on a calculation of the total volume of a the volume of space to be protected (e.g. the team armored vehicle compartment), the total number and the Arrangement of the extinguishing provided as suppression elements Containers containing medium in this as well as the concentration of the extinguishing agent in this room volume, with the one Suppression can be achieved (typically five Percent), the amount of extinguishing agent can be determined each container must contain.

In practice, the container is like an extinguishing agent Halon 1301 filled. The extinguishing agent is in the liquid Condition filled under pressure and takes part of the Container. Furthermore, the container takes a pressurized gas, such as Nitrogen, on.  

The relationship between the different parameters, that determine the speed at which the delete medium leaves the container is determined by the following approximate relationship:

U = discharge velocity of the extinguishing agent in the liquid state (in units of 0.305 m / s) g = gravitational acceleration (0.305 m / s²) r fl = density of the extinguishing agent in the liquid state (in units of 0.01602 g / cm³) Pn = partial pressure of the Compressed gas in the container (in units of 47.876 Pa) v no = specific volume of the compressed gas in the container (in units of 62.37 cm³ / g) a = effective area of the outlet opening (in units of 929 cm²) m n = weight of the compressed gas in Container (in units of 454 g) k n = polytropic constant of the compressed gas P f = partial pressure of the extinguishing agent vapor (in units of 47.876 Pa) v fo = specific volume of the extinguishing agent vapor in the container (in units of 62.37 cm³ / g) m f = Weight of the extinguishing agent in the gas phase in the container (in units of 454 g) K f = polytropic constant of the extinguishing agent P a = atmospheric pressure (in units of 47.876 Pa)

This relationship can be done according to conventional numerical Iteration calculation with an electronic computer to solve. The following parameters are varied in the program: Total container volume, internal container pressure in the filled Condition, total weight of the extinguishing agent, effective off opening area and ambient temperature at the application place.

For a given emptying time and a given volume of the extinguishing agent, the computer program provides a multitude of combinations of the various parameters, from which a usable combination can be selected and the container can be constructed on the basis of this. The exit velocity U of the extinguishing agent is chosen so large that the desired concentration of the extinguishing agent in the room volume results within 150 ms after triggering.

After choosing a given combination of parameters the amount of extinguishing agent and stick substance and thus the container volume and the area of the Outlet opening for a given temperature at the insert known location.

Then one determines the container dimensions and the interior design on the basis of the requirement that the ratio between the outlet diameter d and the container diameter D should be in the range of 1: 5 to 1:10. The limits of these dimensions are determined by the conditions imposed by the installation site. The shape of the narrowing container part, which connects the container body with the outlet, is determined according to the teaching of Rouss-Hassen on pages 580 to 581 of the "Engineering Handbook" by SG Ettingen, Vol. 1, 1954 (Hebrew), which the Relationship between the length L of the tapered part, which is formed in longitudinal section by two intersecting parabolas 212, 214 , and the container diameter D and the relationship between the length L and the intersection 216 of the two parabolas 212, 214 indicates.

In a built and tested embodiment, the container diameter D = 150 mm, the outlet diameter d = 26 mm and the length of the tapered part L = 110 mm. The intersection of the parabolas is 90 mm along L from the outlet; the total length of the container is 275 mm.

The container is made of high-strength metal according to shape or depth drawing process for high pressure applications and has a smooth inner surface to prevent friction loss to keep low.

At the outlet end of the suppression element 210 , a pressure detector as a pressure monitoring device and a release valve 230 is arranged. The release valve 230 has a collar 232 which is placed tightly on the suppression element 210 at the outlet. A fastening device 234 for the pressure monitoring device is screwed onto the collar 232 and sealed against it with an O-ring 235 . A second fastening device 238 interacts with the fastening device 234 and is fixed thereon by means of a screw 240 which is screwed into a threaded hole 242 .

The collar 232 and the fastening devices 234, 238 together form a flow channel 260 for the exit of the extinguishing agent from the container 210 , which extends from the outlet in the generally coaxial orientation. This flow channel 260 is closed by a tear disk 244 , which lies between the cooperating fastening devices 234, 238 .

In the fastening device 234 , a radially extending channel 246 is provided for filling, which is closed by a plug arrangement 248 . A channel 250 is in flow communication with this channel 246 , which leads to a pressure detector 252 . The pressure detector 252 can be any suitable, quickly responsive pressure detector. The high response speed for detecting the extinguishing agent outlet is achieved with a Venturi suction effect. The pressure detector 252 provides an output signal via an electrical cable 254 , which is connected to a plug connection 256 , which in turn is mounted on a tightly sealed cover element 258 , which covers the outlet end of the suppression element 210 .

The pressure detector 252 performs a double function: first, it shows the static internal pressure of the filled suppressing element 210 , thus acts as an operability detector and thus monitors the readiness for use of the suppressing element 210 , and second, it immediately reports the release of extinguishing agent from the suppressing element 210 by doing the Pressure drop in channels 246 and 250 due to a flow of the liquid extinguishing agent through the flow channel 260 is detected using the venturi suction effect and thus acts as an outflow detector.

A device that generates high speed pressure and may also be referred to as a "pressure pulse generator", typically a detonator 262 , is mounted on the fastener 238 and is in communication with the flow channel 260 via only one inclined channel 264 in the fastener 238 which opens just above the tear disc 244 . The detonator 262 is triggered by an electrical signal on a cable 266 to the connector 256 and generates a pressure pulse that hits the tear plate 244 through the channel 264 , tears it open and an immediate and essentially unimpeded emergence of the pressurized extinguishing agent from the Under pressure element 210 allowed.

It is a further peculiarity of the present arrangement that the pressure generator is located completely outside of the flow channel 260 and is connected to it only via the further channel 264 , in order not to disturb the outlet flow of the extinguishing means. Since the pressure detector 252 is similarly arranged outside the flow channel 260 , the extinguishing agent can flow out essentially undisturbed after the tear disk 244 is torn open.

The sealable cover member 258 is attached to a mounting collar 270 which can be welded to the suppression member 210 or otherwise attached. The cover element 258 forms a short nozzle 272 , which is coaxial with the flow channel 260 and is wider than this, so as not to hinder the outlet flow.

It is a further peculiarity of the present arrangement that the pressure detector detects the discharge of the extinguishing agent from the container within 10 ms and that the actuating circuit, for example the actuating circuit 20 , actuates an additional suppressing element within 30 ms after a suppressing element has failed.

Claims (14)

  1. An actuation circuit for use in a fire and explosion suppression arrangement, comprising a plurality of detectors and a plurality of suppression elements, characterized in that the actuation circuit ( 20, 40 ) has a first device, which operates in a first operating mode, for actuating the suppression elements ( 32 , 210 ) in response to different types of detection, comprising:
    • a) a first device which operates in response to detection by a first number of detectors ( 22, 30 ', 32', 60 ) within a first period of time that it actuates a first number of suppression elements ( 32, 210 ); and
    • b) a second device which operates in response to detection by a second number of detectors ( 22, 30 ', 32', 60 ) within a second period of time that it a second number of suppressing elements ( 32, 210 ) operated.
  2. 2. Actuating circuit according to claim 1, characterized in that it also has a device operating in a second operating mode for actuating the suppression elements ( 32, 210 ) in response to detection by at least one detector ( 22, 30 ', 32', 60 ) .
  3. 3. Actuating circuit according to claim 2, characterized characterized in that the first operating mode is a Normal mode and the second mode a combat Operating mode is.
  4. 4. Actuating circuit according to claim 1 or 2, characterized in that the device operating in a first operating mode also has a third device which, in response to detection by a third number of detectors ( 22, 30 ', 32', 60 ) third number of suppressing elements ( 32, 210 ) actuated.
  5. 5. Actuating circuit according to claim 1 or 2, characterized by a device ( 252 ) for determining the failure of the operation of suppression elements ( 32, 210 ) and a device for actuating additional suppression elements ( 32, 210 ) in response to a detected failure.
  6. 6. Actuating circuit according to claim 1, characterized in that the first device operates in response to detection by at least two detectors ( 22, 30 ', 32', 60 ) in more than 10 msec in that it has a single suppression element ( 32, 210 ) actuated.
  7. 7. Actuating circuit according to claim 6, characterized in that the second device operates in response to detection by at least two detectors ( 22, 30 ', 32', 60 ) in less than 10 msec in that it has two suppression elements ( 32, 210 ) operated.
  8. 8. Actuating circuit according to claim 7, characterized in that it comprises a third device operating in the first operating mode for actuating two suppression elements ( 32, 210 ) in response to detection by at least three detectors ( 22, 30 ', 32', 60 ) having.
  9. 9. actuation circuit according to claim 8, characterized by means ( 252 ) for determining the failure of the operation of a suppression element ( 32, 210 ) and means for actuating an additional suppression element ( 32, 210 ) in response to the detected failure.
  10. 10. Actuating circuit according to one of claims 1, 3 and 9, characterized in that the actuating circuit ( 20, 40 ) to a subsequent detection within 5 sec after the actuation of a suppression element ( 32, 210 ) in response to an earlier one Detection has taken place, is able to work.
  11. 11. Actuating circuit according to claim 3, characterized in that the device operating in combat mode operates two suppression elements ( 32, 210 ) in response to detection by at least one detector ( 22, 30 ', 32', 60 ).
  12. 12. Actuating circuit according to claim 11, characterized by means ( 252 ) for determining the failure of the operation of a suppression element ( 32, 210 ) and means for actuating an additional suppression element ( 32, 210 ) in response to the detected failure.
  13. 13. Actuating circuit according to claim 3, characterized in that the actuating circuit ( 20, 40 ) is operable for a subsequent detection within 5 sec after the actuation of a suppressing element ( 32, 210 ), which has taken place in response to an earlier detection.
  14. 14. Actuating circuit according to claim 9, characterized in that it also comprises a device operating in a second operating mode for actuating two suppression elements ( 32, 210 ) in response to detection by at least one detector ( 22, 30 ', 32', 60 ) having.
DE19792954429 1978-02-27 1979-02-26 Expired DE2954429C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IL5413878A IL54138A (en) 1978-02-27 1978-02-27 Fire and explosion detection and suppression system

Publications (2)

Publication Number Publication Date
DE2954429A1 DE2954429A1 (en) 1985-02-28
DE2954429C2 true DE2954429C2 (en) 1988-10-06

Family

ID=11050119

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19792907547 Expired DE2907547C2 (en) 1978-02-27 1979-02-26
DE19792954429 Expired DE2954429C2 (en) 1978-02-27 1979-02-26

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19792907547 Expired DE2907547C2 (en) 1978-02-27 1979-02-26

Country Status (4)

Country Link
US (1) US4270613A (en)
DE (2) DE2907547C2 (en)
GB (1) GB2020971B (en)
IL (1) IL54138A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200340A1 (en) * 1992-01-09 1993-07-15 Deugra Ges Fuer Brandschutzsys Selective detection equipment extinguishing fires - monitors readiness of extinguisher and warns of pressure deficiency endangering response to infrared-detector-generated alarm.

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3264770D1 (en) * 1981-08-20 1985-08-22 Graviner Ltd Improvements in and relating to fire and explosion detection and suppression
IL65517A (en) * 1982-04-18 1988-02-29 Spectronix Ltd Discrimination circuitry for fire and explosion suppression apparatus
IL65715A (en) * 1982-05-07 1993-02-21 Spectronix Ltd Fire and explosion detection apparatus
IL65907A (en) * 1982-05-27 1988-02-29 Spectronix Ltd Apparatus for emergency operation of vehicle fire extinguishing system when vehicle is not in operation
IL65906A (en) * 1982-05-27 1990-03-19 Spectronix Ltd Apparatus for detection and destruction of incoming objects
US4765244A (en) * 1983-04-15 1988-08-23 Spectronix Ltd. Apparatus for the detection and destruction of incoming objects
GB8324136D0 (en) * 1983-09-09 1983-10-12 Graviner Ltd Fire and explosion detection and suppression
DE3804991C1 (en) * 1988-02-18 1999-07-08 Lfk Gmbh System protecting active armor from incoming munitions with dual hollow charges and laser proximity sensors
US4887674A (en) * 1988-03-22 1989-12-19 Galosky David G Cartridge operated fire extinguisher
US4893680A (en) * 1988-10-17 1990-01-16 The United States Of America As Represented By The Secretary Of The Army Fire suppression activator
GB2251551B (en) * 1991-01-10 1994-08-31 Graviner Ltd Kidde Detonation suppression and fire extinguishing
RU2046614C1 (en) * 1991-04-08 1995-10-27 Всесоюзный научно-исследовательский институт противопожарной обороны Device for detection and volumetric suppression of fire and smoke-forming compound
DE19636725C2 (en) * 1996-04-30 1998-07-09 Amtech R Int Inc Method and device for extinguishing room fires
RU2101054C1 (en) * 1996-04-30 1998-01-10 Закрытое акционерное общество "Техно-ТМ" Aerosol-forming composition for fire extinguishing and a method of its making
US5850285A (en) * 1996-07-29 1998-12-15 Southwest Research Institute Advanced missile approach warning system (amaws) and stealth (low observables) detection based on exploitation of quantum effects
US6076610A (en) * 1996-08-30 2000-06-20 Zwergel; James C. Vehicular fire extinguishing device
US7619867B2 (en) * 2002-10-10 2009-11-17 International Business Machines Corporation Conformal coating enhanced to provide heat detection
US8227756B2 (en) 2009-06-24 2012-07-24 Knowflame, Inc. Apparatus for flame discrimination utilizing long wavelength pass filters and related method
CA2885226A1 (en) 2012-09-23 2014-03-27 Tyco Fire Products Lp Fire suppression systems and methods

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR323008A (en) * 1902-07-11 1903-02-21 Piguet Et Cie Soc Lances pulvérisatrices for water cooling
US1674480A (en) * 1927-09-10 1928-06-19 A M Lockett & Company Ltd Spray nozzle
US2495208A (en) * 1945-05-17 1950-01-24 Factory Mutual Res Corp Fog producing spray nozzle
DE1094597B (en) * 1953-04-09 1960-12-08 Graviner Manufacturing Co Means to oppress explosions
US3513311A (en) * 1968-02-29 1970-05-19 Fike Metal Prod Corp Radiation sensitive apparatus for activating a fire or explosion protection system
US3541539A (en) * 1968-11-29 1970-11-17 Us Air Force Integrated fire and overheat detection system for manned flight vehicles
GB1299352A (en) * 1969-02-05 1972-12-13 Graviner Colnbrook Ltd Improvements in or relating to fluid containers
US3665440A (en) * 1969-08-19 1972-05-23 Teeg Research Inc Fire detector utilizing ultraviolet and infrared sensors
US3653016A (en) * 1970-09-09 1972-03-28 Us Air Force Combination visible light detector and ultraviolet detector coacting as a fire discrimination system
CH537066A (en) * 1971-04-08 1973-05-15 Cerberus Ag Flame detector
US3762477A (en) * 1971-06-09 1973-10-02 G Mobley Fire protection system
FR2151148A5 (en) * 1971-08-20 1973-04-13 Detection Electro Fse
US3762479A (en) * 1971-11-12 1973-10-02 Fike Metal Prod Corp Remotely actuatable portable fire suppression apparatus
US3931521A (en) * 1973-06-29 1976-01-06 Hughes Aircraft Company Dual spectrum infrared fire detector
US3865192A (en) * 1973-07-19 1975-02-11 Pyrotector Inc Fire detection and extinguishing system
US3825754B1 (en) * 1973-07-23 1985-12-10
US3925772A (en) * 1974-06-27 1975-12-09 Com Tel Inc A.C. power supply circuit in combination with an A.C. source and a D.C. source
US3915237A (en) * 1974-07-11 1975-10-28 Us Army Rapid fire suppressant discharge
US4005754A (en) * 1975-03-06 1977-02-01 Gerhard Linden Process for the automatic reporting and extinguishing of fires
US4138670B2 (en) * 1977-01-03 1994-07-26 Pittaway Corp A.C. powered detecting device with battery backup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200340A1 (en) * 1992-01-09 1993-07-15 Deugra Ges Fuer Brandschutzsys Selective detection equipment extinguishing fires - monitors readiness of extinguisher and warns of pressure deficiency endangering response to infrared-detector-generated alarm.

Also Published As

Publication number Publication date
GB2020971B (en) 1982-11-17
DE2907547A1 (en) 1979-11-08
DE2954429A1 (en) 1985-02-28
DE2907547C2 (en) 1986-10-09
GB2020971A (en) 1979-11-28
US4270613A (en) 1981-06-02
IL54138D0 (en) 1978-04-30
IL54138A (en) 1983-10-31

Similar Documents

Publication Publication Date Title
EP1928559B1 (en) Fire suppression system
US8322452B2 (en) Device for increasing the effectiveness of the pressurizing gas in an extinguisher bottle
US5792976A (en) Rapidly deployable volume-displacement system for restraining movement of objects
DE60034491T2 (en) hybrid fire extinguisher
US5936531A (en) Electrical fire sensing and prevention/extinguishing system
CA2492133C (en) Fire extinguisher
US5660236A (en) Discharging fire and explosion suppressants
RU2269082C2 (en) Defensive device, mainly self-defensive device and cartridge case used in it
US3833063A (en) Nonfragmenting pyrotechnic fire extinguisher
CA2665070C (en) Fire extinguishing system for a casing
US6189624B1 (en) Actuating mechanism for fire extinguisher
US4436159A (en) Manual/electric activated squib actuated discharge valve for fire extinguishers
CA2687046C (en) Hazard detection and suppression apparatus
US3830307A (en) Fire prevention and/or suppression system
AU2011311943B2 (en) Inflator-based fire suppression
US20160175626A1 (en) Fire retardation missile system and method
US5877448A (en) Reusable gas-powered war game land mine
US6003608A (en) Fire suppression system for an enclosed space
US4199682A (en) Fire and explosion detection apparatus
US5894891A (en) Method and device for extinguishing fires
RU2118551C1 (en) Fire-extinguishing method (versions), apparatus (versions) and fire-extinguishing system
EP1896142B1 (en) Tire fire suppression and vehicle with same
US20120186831A1 (en) Discharge of fire extinguishing agent
US8800674B2 (en) Apparatus for releasing a fluid to the atmosphere
US9573005B2 (en) Protection device

Legal Events

Date Code Title Description
Q172 Divided out of (supplement):

Ref country code: DE

Ref document number: 2907547

8110 Request for examination paragraph 44
AC Divided out of

Ref country code: DE

Ref document number: 2907547

Format of ref document f/p: P

D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8339 Ceased/non-payment of the annual fee